Two of Senator Hillary Rodham Clintonâ€™s biggest supporters, who are also two of the Democratic Partyâ€™s most successful fund-raisers, have offered to help raise millions of dollars to stage new primaries in Florida and Michigan.

Gov. Jon S. Corzine of New Jersey and Gov. Edward G. Rendell of Pennsylvania said Sunday that they would be willing to raise half the $30 million it would take to run new contests in those two states. Mr. Corzine and Mr. Rendell submitted their proposal to The Washington Post.

The two governors argue that the Democratic National Committee, and not taxpayers in Florida and Michigan, should pay for a re-election in those states.

Democrats have been struggling to find a way to seat the delegates from Michigan and Florida, who were excluded when those states held primaries in January, violating national party rules.

Govs. Corzine and Rendell’s argument fly in the face of Howard Dean’s recent statements. Dean has argued that the DNC should focus its limited money on the presidential election in November.